var express = require('express');
var session = require('express-session');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var bodyParser = require('body-parser');
var mongoose = require('mongoose');
var cookieParser = require('cookie-parser');


global.dbHandel = require('./database/dbHandel');
global.db = mongoose.connect('mongodb://localhost:27017/nodedb');


var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.engine('html',require('ejs').__express);
app.set('view engine', 'html');

app.sessionMiddleware = session({
  secret: 'keyboard cat',
  cookie:{ 
      maxAge: 1000*60*30
  },
  resave: true,
  saveUninitialized: true,
});

app.use(app.sessionMiddleware);



app.use(function(req,res,next){ 
 
  res.locals.user = req.session.user;   // 从session 获取 user对象
  var err = req.session.error || '' ;   //获取错误信息
  delete req.session.error;
  res.locals.message = "";   // 展示的信息 message
  if(err){ 
      res.locals.message = '<div class="alert alert-danger" style="margin-bottom:20px;color:red;">'+err+'</div>';
  }
  next();  //中间件传递
});



// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));



var routes = require('./routes/index');
var users = require('./routes/users');

app.use('/', routes);
app.use('/users', users);
app.use('/login',routes);
app.use('/register',routes);
app.use('/home',routes);
app.use('/logout',routes);
app.use('/profile',routes);
app.use('/avatar',routes);
app.use('/room',routes);


// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
